Seeing scale

I am planning on documenting my observations. I have a 9.25 and an ed80. I don’t know how to judge seeing. I have read several articles and it seems that there are several ways to judge seeing. I would like to know what the most popular scale most people use. I'm in the midst of researching Dawe’s Limit. If there is something simple to start off with, so I can get an idea, that’s pretty much what I'm looking for right now. I'm planning on getting my Messier certificate. Thanks

Hi David,

Pickering's scale is the one I see being referred to most of the time.

Here's a link to a sight with examples of each level.

http://uk.geocities.com/dpeach_78/pickering.htm

Hope this helps,

Pernel